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fix stack fill example #263

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Merged
thomasp85 merged 2 commits into from
Mar 24, 2026
Merged

fix stack fill example #263

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ea56598
fix stack fill example
thomasp85 Mar 24, 2026
1307838
Merge branch 'main' into save-stack-fill
thomasp85 Mar 24, 2026
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4 changes: 2 additions & 2 deletions doc/syntax/layer/type/area.qmd
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Expand Up @@ -67,12 +67,12 @@ DRAW area
SETTING position => 'identity', opacity => 0.5
```

When `position => 'stack_fill'` we're plotting stacked proportions. These only make sense if every series is measured in the same absolute unit. (Wind and temperature have different units and the temperature is not absolute.)
Whith the default `position => 'stack'` we can normalise the total so that each stack totals to the same value. These only make sense if every series is measured in the same absolute unit. (Wind and temperature have different units and the temperature is not absolute.)

```{ggsql}
VISUALISE Date AS x, Value AS y, Series AS colour FROM long_airquality
DRAW area
SETTING position => 'fill'
SETTING total => 100
```

An alternative is to center the stacks to create a steamgraph
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